doctype html
head
	meta(charset='utf-8')
	meta(name='viewport', content='width=device-with,initial-scale=1.0')
	title 响应式表单
	link(rel='stylesheet', href='./css/app.css')
body
	.container
		.row
			form.form
				.form-group
					input(type='text' placeholder='用户名')
				.form-group
					input(type='password' placeholder='密码')
				.form-group
					input(type='checkbox')
					a(href='#') 记住密码
				.form-group
					button(type='submit') 确认
